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UNITED STATESx PATENT oEEIoE.

ISAAC W. AYRES, OF NEW YORK, N. Y.

WATER-DOOR FOR STEAM-BOILERS.

Specification of Letters Patent No. 5,888, dated October 31, 184:8'.l

the door to revolve upon.

But to describe more particularly the nature of my invention I will proceed to describe the mode of constructing and com-` bining the several parts of the same by referring to the accompanying drawings.

Figure l, represents a cut section of the door, and connecting pipes; and Fig. 2, an end view of the same;` the same letters, in the several drawings, having reference to the same parts wherever they occur.

Letter A and A represent the door. In Fig. 2, it represents the side view of the door, which is made of a frame of iron, (or copper if required,) as shown in the cut section, (Fig. 1,) and faced with plates of iron or other metal, so as to make the door a perfectly water or steam tight box, vor may be made by casting the door in composition or other metal in one piece -so as to form the door, with the connecting pipes I I I, at.- tached thereto, as shown in Figs. 1' and 2; and forming at letters B, B, &c.,in the back edge of the door, the induction and eduction pipes, the arrows, showing the direction of the steam or water to, and from the boiler, for the purpose of obtaining a greater amount of heating or fire surface in the boiler, and keeping the fire room cool, as

wellas the preventing of the door burning out; the steam, or water, acting asa medium to carry olf the excess of heat, and thereby keep up a uniform temperature throughout the door andboiler.

Letters C, C, and C, Figs. 1 and 2, connecting pipes from the boiler, and jointing to the water door pipes by means of glands D, D, on which the Vdoor revolves when opened to stoke the fire.

Letters E E, &c., are flanges on the end of the pipes C and C for attaching the same to the boiler head, by bolting or riveting: and

lett-ers F, F, and F the stuffing boxes and glands, for connecting` the pipes C and C from the boiler, and pipes I and I from the door, forthe purpose of making a steam or water tight hingev for the doorto revolve upon whenbeing opened or closed.`

Letters Gr and Gr, the latch secured in the usual way on the outer face of the door, and

` buttoning or latching over the staple H and H (Figs. 1 and 2,) on the head of the boiler;

VHaving now described the mode of making my water door for steam boilers or furnaces I will proceed to state what I claim, and wishto secure.

What I claim therefore is- 1. The water door so arranged as to have a continuous circulation passing through it in combination with steam boilers or fur-4 naces.

2. And I also claim the mode of connecting `the same to the head of a steamboileror furnace in the manner and form substantially as herein described.y

ISAAC W. AYRES.

Witnesses:

R. S. JONES, JOHN H, MoTT. 

